Why Choose the Mersen D075903 Protistor® Semiconductor Fuse?
The Mersen D075903 is a Protistor® BS88-4 high-speed semiconductor fuse-link designed to provide exceptional protection for sensitive power electronic equipment. Engineered specifically for semiconductor applications, it protects diodes, thyristors, IGBTs, GTOs and other power semiconductors against damaging short-circuit currents while delivering excellent current-limiting performance.
Part of the proven Mersen Protistor® BS88-4 series, the D075903 has a 63 A current rating, 690 V AC IEC, 700 V AC UL and 700 V DC UL voltage ratings. The compact 17 × 49 mm British Standard fuse-link incorporates an integrated striker indicator for mechanical indication or remote microswitch operation, simplifying maintenance and fault detection.
Designed in accordance with IEC 60269-1, IEC 60269-4, BS88-4 and VDE 636-23, the Mersen D075903 is ideal for industrial drives, UPS systems, converters, rectifiers and renewable energy equipment requiring dependable semiconductor protection.
Key Advantages
- Genuine Mersen Protistor® high-speed semiconductor fuse.
- 63 A current rating.
- 690 V AC IEC and 700 V UL voltage ratings.
- gR operating class providing full-range semiconductor protection.
- Integrated striker indicator for fault indication and remote signalling.
- 200 kA breaking capacity for demanding industrial applications.
Key Features
- Manufacturer reference: D075903.
- Catalogue number: BS17US69V63P.
- Protistor® BS88-4 semiconductor fuse-link.
- 63 A rated current.
- 690 V AC IEC rated voltage.
- 700 V AC/DC UL rating.
- gR operating class.
- 17 × 49 mm British Standard format.
- Integrated striker indicator.
- Compatible with BS88 semiconductor fuse holders.
Reliable Protection for Critical Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before expensive semiconductor devices can be damaged. Their low let-through energy and extremely fast operating characteristics maximise equipment reliability while helping reduce maintenance costs and production downtime.
The Protistor® BS88-4 range is widely specified for variable speed drives, UPS systems, converters, rectifiers, renewable energy installations and industrial automation equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control equipment.
- Power converters and rectifiers.
- UPS and battery backup systems.
- Renewable energy inverters.
- Industrial automation and control panels.
